However, the two other tournaments which will start this week, the CS:GO Asia Championships and DreamHack Open Summer, will be using the latest version of CS:GO, 1.36.3.8.

Teams at DreamHack Open Summer will be playing on the updated version of Mirage

Patch 1.36.3.8 sees the base damage of the CZ-75 lowered slightly, the M4A1-S receive additional reserve ammo, the MP7's price lowered to $1500 as well as Mirage getting a number of visual changes, with its skyboxes completely removed.

The information was published during this morning by tournament officials, with DreamHack and CS:GO Asia Championship organizers feeling confident about the patch being ready for competitive play.

In regards to the CS:GO update that released last night.

We’ve examined the update and will be using the new version (1.36.3.8) during #DHOpen Summer starting on Saturday in Jönköping, Sweden.

There are also some other small changes to the map.
What I'm talking about here is, that there is no time to adjust to the changes.
So it could happen that players get killed basically because they assumed nobody can see tham at that angle or position.

Only places I can think of where angles, or field of view changed are B bench, removed roof under window and - of course - B apps entrance
Other changes were mostly cosmetical or about improving visibility, it shouldn't be that much of a factor (compared with removed skybox)